CVE-2026-22872— Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| projectcapsule | capsule | < 0.13.0 | affected |
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I. Basic Information for CVE-2026-22872
Vulnerability Information
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Vulnerability Title
Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for cluster-scoped resources. Prior to version 0.13.0, tenant administrators can leverage the Controller's elevated privileges to create cluster-scoped resources (such as ClusterRole and ValidatingWebhookConfiguration) that they cannot create directly, achieving cross-tenant privilege escalation and cluster-level attacks. The attack vector has a few limiting factors. This attack requires Tenant Owner privileges and requires Capsule Controller running with cluster-admin privileges (default configuration). Additionally, some clusters may have additional admission controllers blocking malicious resources. Version 0.13.0 patches this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| projectcapsule | capsule | < 0.13.0 | - |
II. Public POCs for CVE-2026-22872
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-22872 (1)
Vendor Pages for CVE-2026-22872 (1)
- 🔗 Release v0.13.0 · projectcapsule/capsule · GitHubx_refsource_MISC
IV. Related Vulnerabilities
Same product: capsule
Same vendor: projectcapsule
- CVE-2026-30963
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Capsule tenant owner with "patch namespace" permission can h - CVE-2023-48312
Authentication bypass using an empty token in capsule-proxy - CVE-2023-46254
Service accounts can see namespaces of other tenants in caps
Same weakness: CWE-20
- CVE-2026-45685
OpenTelemetry eBPF Instrumentation: MongoDB parser panics on - CVE-2026-45678
OpenTelemetry eBPF Instrumentation: Postgres BIND parsing ca - CVE-2026-45676
OpenTelemetry eBPF Instrumentation: Unsafe fastelf parsing a - CVE-2026-7195
CWE-20: Improper Input Validation in web services in Progres - CVE-2026-3620
Word Replacer <= 0.4 - Authenticated (Administrator+) Stored
V. Comments for CVE-2026-22872
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